Lock.



N. B. HURD.

LOCK. APPLICATION FILED ocT.23. I915. I

Patented Jan. 18, 1916.

2 sntns-sucn 1.

N. B. HURD.

LOCK. APPLICATION FILED OCT. 23. 1915.

1,168,725. Patented Jan. 18, 1916.

Z-SHEETS-SHEET 2.

To all whom it may concern: I I Be it known that I, NORMAN B. Home, a citizen of the United States of America, residing at New Britain, Connecticut, have invented a newand useful Look, of which the following is a specification.

My invention relates to improvements in looks, the object being to provide certain new and useful features whereby certain new functions may be effected which are of particular utility in connection withcertain types of locks, for example, locks such asused in the exit doors of public buildings or stores where it is desired to lock the door from the outside at night, and where it may be desirable during the day to not only leave the door unlocked, but to hold retracted the latch bolt so that in the case of emergency such as fire, panic or the like, the door may be freely swung open. These and other advantages will be apparent to the mechanic skilled in the art from an examination of the accompanying drawings, and a reading of the following description.

Figure l is a face or edge view of the lock. Fig. 2 is a side elevation with the cap plate of the case removed to show the internal lock works. Fig. 3 is a relatively enlarged end view of a cylinder lock of a form which it is preferred to use with the lock work. Fig. 3 is a vertical sectional view through the center showing certain parts in elevation. Fig. 4; is a section on the line H of Fig. 2. Fig. 5 is a view of certain'parts of the lock work mechanism in a different position from that shown in Fig.2. with the parts in still another position. Figs. 7'and 8 are views of keys. v

In the particular formofthe invention as shown in the drawings, I have elected to In the drawings illustrate my improved features as asso-- ciated with the various parts of a so-called mortise lock, although the invention is not limited to that particular type. So also I have elected to show one preferred form of my invention which it will be obvious is capable of modification in many respects.

1 represents the face plate of a lock.

2 represents the lock case.

3 is the locking bolt. In this instance said locking bolt is of the spring latch type.

1 represents what is commonly known as a Application filed October 23, 1915. Serial No. 57,405.

of Fig. 3,

Fig. 6 is a similar view Specification of Letters IPatent.

Patented Jan. 18, 1916.

controller, the well known function of the same being, when repressed, to cause certain dogging mechanism to block repression of the bolt 3 by a 1 of the lock. troller 4 operates 6 is a roll-back In this instance the conthe swinging latch dog 5. mounted in the case 2 and in this instance arranged to be operated by the knob spindle 7.

8 1s a key controlled latch retracting lever which is pivotally mounted at 9 in thelock case. The lower end of this lever 8 engages with a plate 10 carried by the tail of the latch bolt, whilethe upper end of said lever is provided with an arm 11 which may be engaged by a suitable key or key controlled means, one form of which will later be described, whereby when the key is turned the latch may be retracted; even though the knob roll-back dogged.

12 is a dog for the roll back 6, the same being movable into and out of the dogging position. In Fig.2 the dog 12 is shown as overstanding part of the roll-back 6 so as to prevent the same from being turned in the latch retracting direction. In Figs. 5 and 6 this dog 12 is shown in the off position wherein the roll-back .6 is free to be turned by the knob spindle 7, which in this particular instance is located on the out door side of the lock. The dog 12 may have a suitable support or guide, as shown, and may be suitably held in the on and off position as by a friction spring 13. The upper end of the roll-back 6 in the particular form shown engages with the tail plate 10 of the latch bolt So that when the r0ll-back 6 is turned, it will retract the bolt 3 as. shown in Fig. 5.

14 is another roll-back which is pivoted at 15 in the case 2. In this particular form, this roll-back 14 is rocked on its pivot 15 by a manually operable member 16, located on the indoor side of the look. When this part 16 is lifted the roll-back 14 is swung. The upper end of this roll-back 14 engages the tail plate 10 of the latch indirectly through the medium of the lower end of the lever 8, although this is perhaps not essential in all forms. When the part 16 is moved properly, the roll-back l4 swings and retracts the latch.

As to the parts thus far described, no novtool inserted along the face 6 may be then locked or pin projects arm 22. One end of this am 22 is pivotally supported at 23 on the upper end of alever 24 which in turn is pivotally supported at 25 in the lock case. The lower end of the lever a 24 makes a suitable connection with the dog I 6). The usual s troller 4. 31 is the usual cated in 35, (Fig.

12 so that as the lever 24 is rocked to and fro the dog 12 will be projected and retracted. The other end of the arm 22 is, at certain times, located above the tail plate 10 of the latch bolt (see Fig. 6), and at. other times may be dropped to a position in front of the tail 10 (see Fig. 5). 26 is a shoulder on thelower side of the arm 22 which at certain times is permitted to project down behind a shoulder 27 fixed within the lock case (see Fig. 5) and at other times may stand slightly above said shoulder (see Fig. rings may provided wherever desirab e, for example, 28 is a spring normally operating in a. directioii to 11ft the rear end 0 the arm 22, and 29 is the usual sprin provided to project the latch bolt 3. 30 is the usual spring for the conspring/ for the latch dogging member 5. The cyllnder lock 0 in this particular instance, is referably constructed substantially as set orth in a. former Patent No. 1,115,040, dated Oct. 27, 1914, and has a fixed roll-back arm 32 and a second roll-back 33. The roll-back arm 32 is designed in this instance to act upon the lever 8-so as to retract the latch bolt should the outside knob roll-back 6. be dogged (see Fig. 2). This roll-back 32 is mounted on the usual cylinder lock plug and is operated by an ordinary key34.' At such times the roll-back 33 is held in an ineffective position. If,- however a special key, which might be termed an emergency key or a proprietors key such as indi- 7) is inserted, it will move the roll-back. 33 into its effective position where when the key is turned it will operate upon-the rocking member 17. Assuming such a key 35 were used, and turned in the direction indicated in Fig. 5, the roll-back 33 would encounter the right hand end of the rocker 17. and if the latch were at that time retracted. as shown in Fig. 5, the tilting of the rocking member 17 would cause the right hand end of the arm 22 to move incline 36 and hold ciated holdin the latch retracted. If, on the other hand t e latch should not be retracted at such a time, the deprexion of the right hand end ofthe lever 17 could not depress the arm 22, but the latter would have to slide 'to'the left which would cause the lever- 24 to shift the dog 12 to theiposition indi: cated in solid lines Fig. 2, an dotted lines, Fig. 6." If the key were turned in the opposite direction, the roll back 33 would engage the other end of the rocking member 17 and shift it from the position indicated in Fig. 2 to the position indicated in Fig. 6, thus again sliding the arm 22 to the right and swinging the lever 24 so as to withdraw the dog 12. By this means it is within the power of the holder of the key 35 to lock the' from theoutside through gagin position. Accordin 1y I preferabl provi e on the dog 5, an'1 ncl1ne36 who may be engaged by the projectmgend of the pivot pin 23 at the upper-end of the lever 24, which, when said ever 24 stands'm the osition indicated in Fig. 6 will enga e the the latch dog 5 ifted.

'The holder of the also look the latch 3' Should the roll back dog 12 be thrown to I the on position (Fig. 2) the latch'dog 5 is controlled by the controller 4, that is to say, when the door is openthe latch dog 5 will be lifted to permit the latch 3 to sprmg back when the door is closing. en the door is fully closed and the controller 4 is repressed by engagement with the edge of the door, the latch dog 5 will drop behind the latch bolt 3 to perform its function in the usual manner.

When, as in the preferred form shown herein, the key is of the usual type assowith a cylinder lock and is arranged to engage indirectly the internal mechanism through the medium of roll-back mechanism,

and when I provide an auxiliary roll-back.

d at 33, the latter may be fore said, with the construction set forth in a former Patent N 0. 1,115,040. I

By making dependent of the latch retracting means, there is no danger of inadvertently or accidentally looking back the latch when it is intended merely to retract the latch.' Again, by the new arrangement-of parts herein disclosed I am enabled to use a'common. key passage located at the outdoor side of the lock for admitting both of the keys by which the several internal lock parts are controlled.

As stated at the outset, I have shown my invention only in one preferred form fully appreciating that a wide variety of modifications may be made by a mechanic skilled in the art without. departing from the spirit .and scope of the invention as disclosed and claimed.

What I claim is:

1. In a lock, a movable latch bolt, means for projecting the same, means for retracting the same, means operable by a key for operating said retracting means, and means independent of said retracting means to lock said latch bolt in its retracted position by the same key.

2. In a lock, a case, a latch bolt movable to and fro therein, yielding means for normally projecting said bolt, means for retracting the latch bolt through and means independent thereof for holding said latch bolt in its retracted position by the operation of said key. r

3. In a lock, a case, a latch bolt movable therein, means for normally projecting the latch bolt, said case having a key-passage, means operable by a key adapted to retract the latch, and means independent thereof for holding said latch in its retracted position by the operation of a key through said aforesaid key passage.

4. In a lock, a case, a cylinder lock, a latch bolt movable therein with means for yieldingly projecting said bolt, means for retracting said bolt, means independent of said retracting means for holding said bolt retracted, with means carried by said cylinder lock and operable by a key for controlling the operation of the latch retracting means and the latch holding means.

5. In a lock, a case, a normally projected spring latch bolt mounted therein, a device mounted in said case and movable therein for retracting the latch, another device also mounted in said case and independent of the latch retracting device for holding the latch retracted, with a key controlled means for operation of either of said devices.

6. In a look, a case, a normally projected spring latch bolt mounted therein, a device mounted in said case and movable therein for retracting the latch, another device also mounted in said case and independent of the the latch hold back means in-' other, both of means when the latch the medium ofa key,

latch retracting device for holding the latch retracted, with a key controlled means for operation of either of said means comprising a cylinder lock ,havin two roll back elements, one of said roll bac elements being movable relatively to the said roll backs being movable simultaneously. 7. In a lock, a latch bolt, means for yieldingly projectingthe same, a key operated means for -\retracting the latch, an independ: ent hand-operated means for retracting the latch, means for dogging the latter against movement in the latch retracting direction, means independent of the lockretracting means capable of holding back the latch when the latter stands retracted, and a key operable device for operating the dogging is projected, and for operating the latch hold back means when the latch stands retracted. 8. In a look, a latch bolt, means for yieldingly projecting the same, a key operated means for retracting the latch, an independent hand-operated means for retracting the latch, means for dogging the latter against movement in the latch retracting direction, means capable of holding back the latch when the latter is retracted, and a key operable device for operating the dogging means when the'latch is projected, and. for operating the latch hold back means when the devices, said latch is retracted, said key operable means including an arm connected at one end to said dogging means, and blocked against descent at the other end bythe inner end of the latch bolt when the latter is projected, said latch bolt moving clear of said arm when it is retracted, whereby said arm may moved into a position to engage and hold said latch retracted.

9. In a look, a latch bolt, .a key operable means for retracting the latch from the out door side of the look, a handle for retracting said latch also from the outdoor side of said lock, :1 dogging means for the latter to prevent the retraction of the latch by the-handle, said dogging means being also key-opsaid latch also from the outdoor side of said Y look, a dogging means for the latter to prevent the retraction of the latch by the handle, said dogging means being also key-operable from the outdoor side of the lock, means independent of the latch retracting .7 movable therein, a key-op tracting the '10 a for the latter,a hold back device for the device being movable in one rection to ho controlled means said directions, sa d key of the latch retracting means,

to'operate the dogging means, other direction to hold back the latch when the latter is retracted, said hold back degiede beingoperativgly gonnegtedt with sai o means an in e en en ggmg said hdld-back direction to operate the dogging, means, and in another difor imparting movement to said hold-back means inboth of said directions. v

12. In a lock, a case,

movable therein,'a key 0 erable lever for retracting the latch, a spindle operable lever for retracting'the latch, a dogging means for the latter, a hold-back device for the latch when the latter is retracted, said holdback device being operatively connected with said dogging means and independent of the latch retracting means, said holdback device being movable one direction and in an-v ..a a springlatch bolt key controlled means ment to' said hold-back meansin,

operable means including a tiltingmem'ber operatively connected with said r01 -back device, and also including a cylinder lock having a rotatable plug, and roll-back mechanism mounted on said plug and operating on said tilting member when the plug-is turned by one key and alsocapable operating on saidlatch retracting means without efiecting said tilting' member when said plug is turned. by a difierentkey. a Q a 13. Ina lock, a'case, a spring latch bolt mounted therein, key controlled'm'jeans also for retracting the latch IIIOVG- for imparting) mounted therein bolt, and key-controlled means independent of said retracting means tohold back said latch in its retracted position, said retracting means'and hold-back means being operable by difierent keys, said case having a passage in common to both of said keys.

14. In a look, a case, a spring latch bolt 7 mounted therein, key controlled means also able by different keys,

mounted therein for retracting the latch bolt, and key-controlled means independent of said retracting means to hold back said latch in its retracted position, said retracting means and hold-back means being opersaid case having a back means being ack the latch, and a keylatch, and a 0th of 1 means,

passage in common to both of said keys, and pin tumbler mechanism arranged to be operated by both. of said keys.

15. In a lock, a case, a spring latch bolt, two independent means' at the outdoor side of, said case for retracting said latch, one of saidr means being key-operable, a key operable dog for preventing the retraction of the latch by the other means, a latch hold back mechanism independent of the retracting means but also operable by the same key designed to operate said dogging means, -said dogging means and said holdmoved into the"'dogging position and the hold-back position respectively by the rotation of said key in the 16. In a lock, a case, a spring latch bolt. 7

therein, two independent means at the outdoor side of said lock, for retracting said latch, one of said means being key-operable, a dogging device for the other retracting means, said dogging device being key-operable, a hold-back means to hold the latch' retracted, said hold-back means being also key-operable and comprising a movable arm operatively associated with said dogging means for moving the y when the latch is projected, said arm being latter by said key movable in the latch hold-back direction only when said latch bolt has been previously retracted.

17. In a lock, a case, mounted therein, of the latch case all times, two independent means at the outdoor side of said case for retracting said latch, one of said last mentioned retracting means being key-operable, a dog for stopping the operation of the other retracting said case having .a key passage on the outdoor side, rmeans for holding the a spring latch bolt means at the indoor side latch bolt retracted, said means being independent of the retracting means, one key operating through said key passage to retract the latch, another key operating through said key assage to hold thelatch retracted after said latch has been previously retracted.

18. In a lock, a case, a spring latch bolt mounted therein, means at the indoor side of the latch case for retracting the latch at all time, two independent means at the outdoor side of said case for retracting said latch, one of said last mentioned retracting means being key-operable, a dog for stopping the operation of the other retracting means, sard case having a key passage on the outdoor s1de, means for holding the latch bolt retracted,'said means being independent for retracting the latch at of the retracting means,

one key operating through said key passage to retract the latch, another key operating through said key passage 5 said latch said hold-l):

movable in to hold the latch retracted after has been previously retracted, 10k means comprising a member two directions, said member being operatively connected with said dogging means whereby when moved in one direction it will operate said dogging means and when 10 moved in another direction it willengage and hold back the latch.

NORMAN B. HURD. 

